I have had this problem sense day two. Welcome to day four! I plugged my Droid into my Mac, as I should, and it works perfectly. I follow the proper removal procedures and everything. I later try to do the same, and it just won't connect at all, not even a charge. I know the alert will come up in notifications, and I know you have to accept it to connect. My problem is that won't come up. I have tried this on a Mac and a PC. The PC comes up with an alert bubble that says the unknown USB device has malfunctioned and Windows can't connect. On the Mac nothing happens at all. As mentioned earlier, I don't even get a charge, but the wall adapter works as it should. I am wondering if it is the cable or what. Please help!